Well, great discussion. I think I am able to ignite the right mantle!
First of all, - I am NO medical professional; I am NO expert either. In fact I am not that educated - work as aircraft maintenance engineer - worked all over the world. My job is not physically demanding, though I stand most part of the day out in the tarmac.
I am simply going by research in Australia where a lot of research is done specifically on reversing T2D
http://www.diabetesvic.org.au/type-2-diabetes . I believe those folks are ahead of everyone in T2D reversal and their efforts directly propelled and funded by Australian Govt. I spent 8 years in Brisbane and had to closely work with one of their medics, who's world is prevention of T2D. If you see their website - yes, it is lifestyle. Most medics say so, in first few sentences of the talk. According to livestrong
http://www.livestrong.com/article/291408-list-of-diseases-caused-by-poor-nutrition/ yes, it can be prevented by changing the 'life style'. Well, I may be wrong (still) - I have no problem in taking that. BTW I don't work for any of these organizations or websites.
Being an Indian I do know about trends of raising T2D; where nobody knows or cares about anything. Literally most folks may not get diagnosed in time. But the point is alarmingly raising T2D cases in 20-40years age group. The factors - high carb diet (the sub of this thread), too much rice intake, then environmental, life style (again I go?), increased intake of processed foods, colas, cokes etc. Same trends and reasons with China (at least in Beijing where lived 4 good years). Very much familiar with 'Okinawa island' and their diet. I fully agree with that practice; but that diet has no focus on T2D. When I was there, I loved that diet and that is it; after that back to whatever available.
My problem is - the information and experience that I have on T2D; info says - 'lifestyle (that can be changed) '; experience says 'T2D family (genetics) can't be changed'. I am the only member of our family who stayed outside; lived a different life (rest are sedentary and got T2D during early 30s of their age). So I am very fearful and trying very hard to stay ahead of T2D, am a divorcee, with limited finances and need to work more years to live on respectable terms. Have seen guys who could reverse or manage T2D. But really never came across plenty examples of 'prevent' (not talking about published case studies).
This points begs me to ascertain the facts -
1. Low carb or restricted carb diet will help T2D patients or not?
2. Low carb or restricted carb diet will help preventing T2D? - this is really what I am looking for
3. What else needs to be done to prevent T2D ? for folks in high risk group (like me - a genuine T2D family, getting older etc)